A system and method for measuring intraocular pressure and corneal viscoelasticity

Abstract

The invention discloses a system capable of measuring intra-ocular pressure and assessing cornea viscoelasticity at the same time. The system comprises a shell with an opening. A flexible thin film is arranged on the opening side of the shell. A containing cavity is formed by the shell and the flexible thin film. The containing cavity is filled with fluid. A pressure module is arranged on the side wall of the shell. The pressure module is used for monitoring the pressure of fluid and adjusting the pressure in the containing cavity. An ultrasonic module is arranged on the top of the shell. By the adoption of the system and method for measuring intra-ocular pressure and assessing cornea viscoelasticity, non-invasive measurement of intra-ocular pressure in vivo and assessment of the mechanical property of the cornea can be achieved, the accuracy and the reliability of measurement of intra-ocular pressure can be effectively improved, the index for describing the mechanical property of the cornea is provided, the individual difference of the mechanical property of the cornea is reflected, reference is provided for clinical diagnosis and treatment, the defects that the abnormal mechanical property of the cornea influences the measurement of the intra-ocular pressure, and the difference of the intra-ocular pressure influences the biomechanical quantitative evaluation of the cornea are overcome.

Description

technical field [0001] The invention relates to the technical field of ultrasonic detection, in particular to a system and method for measuring intraocular pressure and corneal viscoelasticity. Background technique [0002] The cornea is a circular transparent structure at the front of the eyeball. It not only maintains the shape of the eyeball and protects the intraocular tissues together with the sclera, but also is an important part of the refractive system of the eyeball. The shape and focal length of the cornea affect 70% of the refractive power of the whole eye. Normal biomechanical properties, such as elastic modulus and viscosity coefficient, are the guarantee for maintaining corneal function. However, the biomechanical properties of the cornea can be altered by corneal refractive surgery, certain lesions (eg, keratoconus, keratosclerosis), or trauma. Abnormalities in mechanical properties will increase the risk of corneal refractive surgery and may also lead to dev...

AI Technical Summary

Problems solved by technology

However, the above technology also has some shortcomings: First, ORA defines the corneal hysteresis (CH) parameter, which describes the mechanical properties of the cornea from one side, but the relationship with the classical biomechanical parameters is difficult to determine, which is not conducive to accurate and comprehensive description The mechanical properties of the cornea; secondly, the measurement causes a large displacement of the cornea, which is greater than the thickness of the cornea (1mm), causing a nonlinear response of the cornea to stress, which cannot truly reflect the biomechanical properties of the cornea under physiological conditions

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